WILL MAKE BRAINLIEST AND 75 points

1. A

2. A

3. C

4. A

5. B

6. C

7. C

Step-by-step explanation:

1. They fail to distribute the 3, between steps 1 and 2.

2. 2x + 10 = 20 --- 2x = 10 --- x = 5

3.  4x + 10 = 70 --- 4x = 60 --- x = 15

4. 74b + 47 = 29 --- 74b = -18x --- b = -0.24

5. 62c + 86 = 32 --- 62c = -54 --- c = -0.87

6. (3/5)n + 3 = 18 --- (3/5)n = 15 --- n = 25

7. (self explanatory; let me know if you have questions!)

1. A

2. A

3. C

4. A

5. B

6. C

7. C